Coil-winding machine



Nov. 16, 1948; H. A. HILSINGER, JR

COIL WINDING MACHINE k 4 Sheets-Sheet 1 Filed June 7. 1946 a z u INVENTOR H.A.HIL SINGER A 7' TOR/VE Y Nov. 16,1948.

med June 1,.1945

H. A. HILSINGER, JR

COIL WINDING MACHINE FIG. 2

4 Sheets-Sheet 2 INVENTOR 8y HAHIL swam, JR. 9. %(ac E m A TTORNEV H. A. HILSINGER, JR

Nov. 16, 1948 COIL WINDING MACHINE 4 Sheets-Sheet 3 Filed June '7 1946 INVENTOR By H.A.H/LS/NGER,JR @(ac WM A ATTORNEY Nov. 16, 1948. H. HILSINGER, JR

con. WINDING MACHINE '4 Sheets-Sheet 4 Filed June 7, 1945 Wm. A. H

AT TORNEV Patented Nov. 1948 COIL WINDING MACHINE Harry A. Hilsinger, Jr., East Orange, N. as-

slgnor to Bell Telephone Laboratories, Incorporated, New York, N. Y., a corporation of New York ' Application June '1, 1946, Serial No. 675,203

Claims. (Cl. Mil-92.2)

This invention relates to coil winding machines and more particularly to a machine for winding coils of the type used in cathode ray tubes and the like.

In connection with cathode ray tubes, coils are used which are wound as in the ordinary manner with concentrically disposed layers around a mandrel of rectangular cross-section, the longer sides of the coil thus formed being afterwards bent to a curve corresponding to that of the diameter of the cylindrical portion of the tube with the consequent disarrangement of the wireturns and, therefore, the changing of the electromagnetic characteristics of the coil.

The object of this invention is the provision of a machine for winding cathode ray tube coils in which two parallel sides of the coil are formed on a mandrel with a curvature corresponding to that of the diameter of the cylindrical portion of the cathode ray tube with which the coils are used, thus avoiding the'damaging of the coil in a subsequent bend-ing operation of its required curved formation.

In the drawings:

Fig. 1 is a side elevation view showing the op-' erating parts in position for 'winding one of the curved sides of the coil on the mandrel at the starting point of a coil winding operation;

Fig. 2 is a rear elevation view of Fig. 1 showing the drive for the intermittent rotary operation of the frame supportingthe mandrel and for the intermittent rotation of the mandrel on the frame;

Fig. 3 is a view of the mechanism shown in perspective with the operating parts in position shown in Fig. 1, the mounting frame being shown yieldably held in its non-operated position by a" detent mechanism;

Fig. 4 is a view of the mechanism in perspec-" 'tive shown with the operating parts in position at a point, for beginning the winding of one of the straight side portions of the coil by the simultaneous rotation of the frame supporting the mandrel for the coil and that of the cam used for rotating such mandrel on the frame; Fig. 5A is a partial view showing the mandrel and the wire secured thereon in position for starting the winding of a curved portion of the coil;

Fig. 5B is another partial'view showing the mandrel turned 180 degrees from the position shown in Fig. 5A at the starting point for the' winding of one of the straight side portions of the coil;

Fig. 5C is a diagrammatic view of the frame shown in position following the winding of one of the straight side portions of the coil; Fig. 5D is a partial view showing the mandrel 180 degrees from the coil winding starting position shown in Fig. 5C; and

Fig. 5E is a diagrammatic view showing the frame 180 degrees from the position shown in Fig. 50, i. e'., following its movement in the direction indicated by the arrow in that figure completing a turn of the wireon the mandrel ina coil winding operation. In the coil winding machine of this invention,

.a base i0, Figs. 1 and'2, is formed with an upright mounting plate ll formed at its upper disposed end with arms Al and A2 extending in parallel spaced relation to each other and perpendicularly to the upright mounting plate I l for supporting a cross bar CB secured thereto by a number of screws 8C2 best seen in Fig. 1.

On the base i0 is securely mounted, as by a number of bolts iiB, a motor l2 having an armature shaft l3 best seen in Figs. 3 and 4 provided with a worm l4 meshing with a worm gear I! keyed on one end of a shaft [8 disposed at right angles to the motor armature shaft II.

On the opposite end of shaft i8 is keyed a driving element of an intermittently operating mechanism in the form of a disc i1 provided with four studs Si, S2, S3 and S4 extending perpendicularly to one side thereof for engaging radially disposed slots Cl I, Cl2, CI3 and C respectively, in a disc 22 keyed to one end of a shaft 23 for rotating a cam 24 keyed to the opposite end of shaft 23 while the studs 83 and S4 carried by-disc il project through to the opposite side of the disc l'l for successively engaging with slots Wl-W2 and W3-W4 respectively, in a Geneva gear R keyed on one end of a sleevev 25 journaled in ball bearings BI and B2 fitted into openings in the mounting plate II and the cross bar CB.

The sleeve 25 serves for rotatably supporting the shaft 23 and is formed with a collar portion CF best seen in Figs. 1 and 4 to which is secured, as by a plurality of rivets RT, a yoke-shaped member M to which in turn is secured, as by a number of screws SC, a U-shaped frame 28, while a wheel 21 keyed on the sleeve 25 adjacent the Geneva gear R is provided with two diametrically opposite notches Ni and N2, Figs. 3 and 4, cooperating with a spring-pressed pawl-like member 28 to form a detent device serving for holding theframe 26 against rotation as would be imparted by friction during the operation of shaft 23 in the sleeve 25 as effected by the rotation of disc ll for rotating the cam 24 in a cycle movement to a mandrel 43 through a gearing mechanism comprising the gear 83 keyed on shaft 29, the gear 34 mounted on a shoulder screw 38 and a gear keyed to one end .of a spindle 36 rotatably mounted in a sleeve 31 carried by the arm Xi of U-shaped frame 26. Spindle 33 is formed with a cone-shaped element 39 cooperating with a cone-shaped element 4|, mounted for free rotation on a spindleJ2 which is slidably mounted in a sleeve 43 carried by the arm X2 of the U-shaped frame 26 while a spring M is tensioned between the collar L formed on the spindle 42 and the cone-shaped element M to serve for readily centering the mandrel on the frame, while a pin carried by element 39, as shown in Fig. 1, engages a groove 46, Figs. 1 and 4, in the mandrel 40 for locating the mandrel and the paralielly disposed pins Gil-48A and ie-49A carried thereby relative to the normal or starting position of frame 28. 7

An electric switch SD secured on the arms Al and A2 of the mounting frame has its operable element disposed in engageable relation with a cam Bl carried by the frame 28 for operating a revolution counter, not shown, provided for indicating the number of turns of frame 26 and thereby the number of turns in the coil thus wound, the removal of the pins ts-ABA and 49-49A from the mandrel permitting the freeing of the coil therefrom.

In a typical example in the winding of a coil according to this invention, one end of the wire W is attached, for example, to the pin 58 at a point Y1 as shown in Figs. 1,3 and 5, and the wire held with a light tension in an ordinary 'CH and OH in disc 22 for rotating the shaft 22 I and cam 26 carried thereby, the shaft 28 and the mandrel 40 180 degrees for winding the other curved side-ofthe. coil between the points Y3-Y2 which is followed by the successive engagement of pins 83 and fil'with the slots C18 and Cid of disc 22 and slots-W3 and W4 ofthe Geneva gear R for winding the other straight side Yd-Yi of the coil when the frame 26 has again reached the manner. The operation of motor i2 through the e rotation of worm It on the armature shaft is and worm gear i5 on shaft i3 is effective to rotate the disc i! in the direction indicated by the arrow in Figs. 1, 2 and 3 when the pin Si, which extends perpendicularly to the right side of disc il, engages the slot CH in the disc .22 for rotating the shaft Hand thereby the cam 2d keyed thereon. Upon the'rotation of cam 24 the lobe portions Eli and B2: of this cam successively engage the arms al and c2 of shaft 25) for rotating it an angular distance of substantially 180 degrees, 1. e., from the position shown in Figs. 1, 3 and 5 to the position shown in Figs. 4 and 58 thus winding the wire W around the mandrel w from the point Yi to point Y2.

Upon the continued operation of disc I! the pin S3 which projects from both sides of disc I1 is now in position as shown in Fig. 4 for engaging the slot WI in the Geneva gear R and the slot- CI3 in the disc 22 for rotating them and thereby the cam 24 and the frame 26 simultaneously an angular distance of 180 degrees from the position shown in Figs. 1, 3 and 4 to the position shown in Fig. 5C by the pins 32 and $4, the latter engaging the slot C of disc 22 and in the slot NW of Geneva gear R for winding the wire from point Y2 to point Y2. one of the straight sides of the coil when the spring-pressed pawl 28 automatically engages the notch N2 at the periphery of wheel 21.

The continued rotation of disc il causes the pins Si and S2 to successively engage the slots starting position and this cycle of operation is continued to the completion of the coil, each turn of wire on the mandrel being recorded by the operation of the switching device SD, above-mentioned, actuated once for each turn of the frame.-

What is claimed is:

1. In a machine for winding rectangularlyshaped coils two opposite sides of which are curved and the other sides straight, said machine comprising a rotatable frame, a mandrel for the coils mounted on said frame having tangentially disposed pins at its periphery, a rotatable cam, a shaft rotatably mounted on said frame actuated by the operation of said cam, and a mechanism for successively intermittently actuating said cam and said frame, said cam imparting rotation to said mandrel for winding the curved sides of the coil as determined by the angular spaced relation of said pins on said mandrel and the rotation of said frame winding the straight sides ofthe coil.

2. A machine for winding a rectangularlyshaped coil having two opposite sides curved and two sides straight, said machinev comprising a rotatable shaft, a sleeve rotatably mounted on said shaft, a U-shaped frame mounted on said sleeve for rotary movement therewith, a cam carried by said shaft, a mandrel mounted on said frame having means projecting at its periphery for determining the perimeter of the coil, a shaft mounted for rotary movement on said frame actu-- perimeter formed of two curvedsides and two straight sides, said machine comprising a mounting having a pair of laterally extending arms, a cross bar secured at the end of said arms, a sleeve Journaled in said frame and said cross bar, a shaft extending through said sleeve for rotation therein, a cam keyed on said shaft, a frame carried by said sleeve, a shaft mounted on said frame having means disposed in operative relation with said cam, a mandrel for the coil mounted on said frame and actuated by the operation of the lastn entioned shaft, and an intermittently actuating mechanism for actuating said frame and said mandrel in timed relation to each other, the operation of said cam winding the curved side of the coil on the mandrel and the rotation of said frame winding the straight sides 01' the coil, and means for holding said frame stationary during the rotation of said mandrel.

. 4. In a machine for winding a coil having two straight parallel sides and two curved sides, said machine comprising an intermittently operating mechanism, a pair of concentrically disposed shafts actuated in timed relation by said mechanism, a frame carried by one of said shafts, a mandrel mounted on said frame and movable therewith for winding the straight parallel sides of the coil, a cam carried by the other of said cam for operation by the movement thereof during the stationary period of said frame by said mechanism for winding the curved sides of the coil, said mandrel comprising a tubular member, a pair of spindles journaled on said frame, cone elements carried by said spindles disposed in co axial spaced relation to each other, spring means tensioned between said frame and one of said cone elements to cause the latter to engage said tubular member to force it into frictional engagement with the other of said cones, andfmeans operatively connecting the last-mentioned cone to the shaft mounted on said frame for actuating said mandrel.

5. In a machine for winding rectangularly-' 20 Number mittently operating mechanism keyed thereon, a frame carried by one of said concentric shafts, a cam carried by the other oi said concentric shafts, a mandrel for the coil rotatably mounted on said irame. means actuated by the rotation of said cam for actuating said mandrel for winding the curved side of the coil upon the operation of one of said driven intermittently operable elements in timed relation with the operation 0! said frame by the other of said driven intermittently operating elements for winding the straight sides of the coils.

HARRY A. HILSINGER, JR.

I REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Date .i Jan. 25, 1927 Sept. 28, 1927 

